An obligate parasite, or holoparasite, is a parasitic organism that cannot complete its life-cycle without exploiting a suitable host.
Part of the Andes mountain range, Aconcagua is the second highest of the Seven Summits, behind only Mount Everest in Asia. At 22,837 feet (6,961 meters), not only is it the highest mountain in South America, it is the tallest peak in all of the Americas as well as the Southern and Western Hemispheres.
The Western hemisphere is defined as the area west of the Prime Meridian, but east of the International Date Line. Scotland, Northern Ireland and Wales, which are part of the United Kingdom, also belong to the Western hemisphere. The equator is located at 0 degrees latitude and separates the Northern and Southern hemispheres. All of Europe is located in the Northern hemisphere.